Fix type check of accuracy
Fix type check of accuracy

okuta/chainer,sinhrks/chainer,chainer/chainer,tigerneil/chainer,AlpacaDB/chainer,muupan/chainer,AlpacaDB/chainer,rezoo/chainer,tkerola/chainer,ytoyama/yans_chainer_hackathon,wkentaro/chainer,hvy/chainer,bayerj/chainer,truongdq/chainer,wavelets/chainer,delta2323/chainer,cupy/cupy,chainer/chainer,kuwa32/chainer,hvy/chainer,sinhrks/chainer,keisuke-umezawa/chainer,niboshi/chainer,t-abe/chainer,okuta/chainer,hvy/chainer,hvy/chainer,aonotas/chainer,kikusu/chainer,kiyukuta/chainer,ktnyt/chainer,niboshi/chainer,sou81821/chainer,jnishi/chainer,jnishi/chainer,keisuke-umezawa/chainer,truongdq/chainer,pfnet/chainer,anaruse/chainer,kashif/chainer,woodshop/complex-chainer,cupy/cupy,ronekko/chainer,hidenori-t/chainer,benob/chainer,woodshop/chainer,elviswf/chainer,yanweifu/chainer,ikasumi/chainer,wkentaro/chainer,chainer/chainer,chainer/chainer,jnishi/chainer,benob/chainer,Kaisuke5/chainer,ktnyt/chainer,t-abe/chainer,tereka114/chainer,cemoody/chainer,masia02/chainer,ktnyt/chainer,laysakura/chainer,okuta/chainer,muupan/chainer,jfsantos/chainer,kikusu/chainer,umitanuki/chainer,minhpqn/chainer,ktnyt/chainer,tscohen/chainer,cupy/cupy,wkentaro/chainer,keisuke-umezawa/chainer,niboshi/chainer,wkentaro/chainer,ysekky/chainer,cupy/cupy,jnishi/chainer,1986ks/chainer,keisuke-umezawa/chainer,okuta/chainer,niboshi/chainer